What do Pied Piper and blockchain tools have in common? Both are always “coming soon.”By now most of us are familiar with blockchain, the technology underpinning cryptocurrencies like Bitcoin and Ethereum. Outside of cryptocurrency, blockchain has many purported use cases in scenarios that require an immutable ledger.Rhetoric has elevated blockchain to godly status, labeling it as a bleeding edge technology poised to disrupt all facets of life, from voting, to smart guns, health data, stock trading, international shipping, and beyond.We’ve seen a ton of other innovative blockchain ideas too, yet many are unproven or simply hypothetical. So, the question is, what projects are successfully implementing blockchain in practice?